A needle tube (3) capable of being inserted into a channel and a needle slider (23) supporting the needle tube (3) and moving the needle tube in the direction of the center line of the needle tube, wherein the needle tube (3) A penetrating end (35) positioned inside the outer peripheral surface of the needle tube (3) when viewed from the centerline direction and capable of entering the tissue, an outer edge of the distal end surface of the needle tube (3), a penetrating end ) And the center line of the needle tube (3) is inclined larger than the inclination angle of the distal end portion of the angle tube with respect to the proximal end portion of the angle tube of the channel, a blade extending from the insertion end to the outer edge And surfaces (33, 34).チャンネルに挿通可能な針管(3)と、針管(3)を支持し針管の中心線方向に針管を移動させる針スライダ(23)と、を有し、針管(3)は、針管(3)の中心線方向から見たときに針管(3)の外周面よりも内側に位置し組織に刺入可能な刺入端(35)と、針管(3)の先端面の外縁と刺入端(35)とを繋ぐ直線と針管(3)の中心線とのなす角がチャンネルのアングルチューブの基端部分に対するアングルチューブの先端部分の傾斜角度よりも大きく傾斜した状態で刺入端から外縁まで延びる刃面(33,34)と、を有する。
